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Finding the Fourth Proportional to 354,866, 489,715.40 and 195,890

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Solution

The fourth proportional to 354,866, 489,715.40 and 195,890 is: 270,328.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,866 : 489,715.40 = 195,890 : x
  2. Step 2: Convert to fraction form
    354,866/489,715.40 = 195,890/x
  3. Step 3: Cross multiply
    354,866x = 489,715.40 × 195,890
  4. Step 4: Simplify right side
    354,866x = 95,930,349,706
  5. Step 5: Solve for x
    x = 95,930,349,706/354,866
  6. Step 6: Final answer
    x = 270,328.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.